Procedia Structural Integrity最新文献_第3页

A simple K-SVD dictionary learning method for baseline-free damage identification purely based on analytical excitation 一种简单的基于分析激励的无基线损伤识别K-SVD字典学习方法

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2026.02.006

Haomiao Fang , Zahra Sharif Khodaei , Ferri M.H. Aliabadi

{"title":"A simple K-SVD dictionary learning method for baseline-free damage identification purely based on analytical excitation","authors":"Haomiao Fang , Zahra Sharif Khodaei , Ferri M.H. Aliabadi","doi":"10.1016/j.prostr.2026.02.006","DOIUrl":"10.1016/j.prostr.2026.02.006","url":null,"abstract":"<div><div>This paper presents a simple K-SVD dictionary learning method for transferable, baseline-free damage identification on composite coupon panels, relying solely on the analytical excitation. The analytical signal, encapsulating universal patterns of Lamb wave pristine signals, can be segmented, and reorganized as ‘shapelets’. These shapelets serve as a universal function to reconstruct baseline signals and further facilitate damage identification. The key innovation lies in the pure use of the analytical 5-cycle Hanning-windowed toneburst signal instead of requiring extensive experimental data, which minimizes data collection efforts and significantly lowers computational time. The proposed methodology is comprised of four steps: candidate generation, K-SVD dictionary learning, dictionary compilation and sparse coding, which has a wide application to different materials, temperature fields, specimen sizes, sensor configurations, etc. Prior to the implementation of the proposed method, a standard signal pre-processing pipeline is operated to enhance the data quality. In this study, experimental comparisons were conducted between the proposed baseline-free K-SVD, time reversal (TR), instantaneous baseline (IB), and reciprocity approach, leveraging data from composite coupon panels. Furthermore, it was extended to detect the barely visible impact damage (BVID) under a temperature range of [20: 5: 50] °C. Consequently, the effectiveness and robustness of the method have been validated based on the high accuracy and consistent localization performance across different damage scenarios.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"80 ","pages":"Pages 53-64"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147424829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemo-Thermo-Mechanical Phase Field Modeling of Sulfide Stress Cracking in DCB Testing and Effect of Plasticity DCB试验中硫化物应力开裂的化学-热-机械相场模拟及塑性影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2026.02.018

M. Elkhodbia , I. Barsoum

{"title":"Chemo-Thermo-Mechanical Phase Field Modeling of Sulfide Stress Cracking in DCB Testing and Effect of Plasticity","authors":"M. Elkhodbia , I. Barsoum","doi":"10.1016/j.prostr.2026.02.018","DOIUrl":"10.1016/j.prostr.2026.02.018","url":null,"abstract":"<div><div>Hydrogen-assisted cracking (HAC), particularly sulfide stress cracking (SSC) in sour environments, threatens the structural integrity of critical components. While a prior model developed by the authors have addressed temperature-dependent hydrogen diffusion and fracture energy degradation within an elastic phase-field framework, the influence of plastic deformation remains underexplored. This work enhances the developed chemo-thermo-mechanical phase-field model by incorporating standard elasto-plasticity and a coupling mechanism where plastic work partially drives fracture. The formulation accounts for temperature-induced stress, hydrogen-induced toughness degradation, and diffusion kinetics. Validation is performed using DCB simulations of P110 steel under sour conditions across various temperatures, benchmarked against experimental data. Both the elastic and elasto-plastic models capture the observed rise in the SSC threshold K<sub>ISSC</sub> with temperature, while the elasto-plastic variant predicts slightly more accurate thresholds. For the SSC conditions examined, plasticity had a limited impact on macroscopic behavior, with temperature-dependent transport and degradation being the dominant factors. The proposed model offers a more complete tool for HAC analysis and can support future studies where plasticity plays a larger role.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"80 ","pages":"Pages 187-194"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147426065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation-based optimization of molten pool position in sand casting of a complex steering knuckle geometry 基于仿真的复杂转向节几何形状砂型铸造熔池位置优化

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2025.12.308

Kazem Reza Kashyzadeh , Negewo Getu Bogale

{"title":"Simulation-based optimization of molten pool position in sand casting of a complex steering knuckle geometry","authors":"Kazem Reza Kashyzadeh , Negewo Getu Bogale","doi":"10.1016/j.prostr.2025.12.308","DOIUrl":"10.1016/j.prostr.2025.12.308","url":null,"abstract":"<div><div>This study presents a simulation-driven approach to optimizing the sand casting process for an industrial component with complex geometry, e.g., a steering knuckle used in vehicle suspension and steering systems. The geometric complexity of the component, which varies by vehicle design, poses significant challenges in achieving defect-free castings. Using advanced casting simulation software, the process was analyzed under various conditions to determine the optimal molten pool position. The evaluation criteria focused on minimizing thermal stresses and reducing casting defects such as air entrapment. Results highlight the influence of pouring direction on defect formation and thermal distribution, offering practical insights for improving casting quality and structural integrity in complex automotive components. According to the findings of this study, it is concluded that by choosing the right location for pouring the melt, the maximum thermal stress in the desired steering knuckle can be reduced by 10 MPa. In addition, the component is produced in a defect-free state or with a defect size that is so small that it can be ignored.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 65-72"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of pre-tension on the fatigue durability of rubber with a single reinforcement layer 预张力对单层补强橡胶疲劳耐久性的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2025.12.319

Karolina Głowacka , Roland Pawliczek , Marko Nagode , Jernej Klemenc , Tadeusz Łagoda

{"title":"The influence of pre-tension on the fatigue durability of rubber with a single reinforcement layer","authors":"Karolina Głowacka , Roland Pawliczek , Marko Nagode , Jernej Klemenc , Tadeusz Łagoda","doi":"10.1016/j.prostr.2025.12.319","DOIUrl":"10.1016/j.prostr.2025.12.319","url":null,"abstract":"<div><div>This study presents the results of fatigue tests on a composite material in which rubber is the matrix, while the reinforcement consists of a single layer of interwoven nylon cords arranged in a 0/90<sup>o</sup> configuration. The tests were carried out using cyclic, symmetrical three-point bending of composite samples. This method, due to the negligible bending-induced stress, resulted in unidirectional cyclic tension in the sample. The loading was displacement-controlled and performed in two variants: without pre-tension and with pre-tension of approximately 10%. The failure criterion was defined as the point at which the force amplitude dropped to 50% of its initial value. Analysis of the results showed that the fatigue process is well described by the fatigue characteristic in the form of maximum strain in the sample versus the number of cycles to failure. Although the strain-time profiles differed between the non-pre-tensioned and pre-tensioned samples, the observed relationship proved to be universal. The application of pre-tension introduced a wider variety of mean values, enhancing the reliability of the obtained results.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 155-160"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sensitivity to notch effect of additively manufactured polymers and polymer-matrix composites 增材制造聚合物和聚合物基复合材料对缺口效应的敏感性

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.009

Sergio Cicero , Sergio Arrieta

引用次数: 0

On dynamic fracture along curved planes of weakness 沿软弱曲面的动态断裂

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.025

Koji Uenishi

{"title":"On dynamic fracture along curved planes of weakness","authors":"Koji Uenishi","doi":"10.1016/j.prostr.2026.01.025","DOIUrl":"10.1016/j.prostr.2026.01.025","url":null,"abstract":"<div><div>The wave field generated by dynamic fracture in elastic solids varies considerably depending on the Mach numbers, i.e. the ratios between the speed of the propagating fracture tip and the longitudinal (P) and shear (S) wave speeds. However, the wave field itself is symmetric with respect to the fracture plane as long as the fracture propagates in a straight manner. This symmetry is held even when fracture propagates straightly along a plane of weakness (interface) between identical solids, and therefore, in order to break the symmetry, usually, fracture propagation along an interface between dissimilar solids is considered. Here, another possibility to break the symmetry, namely, fracture propagation along a curved interface between identical solids, is investigated. As simply expected, two-dimensional finite difference numerical simulations of fracture (an energy source) moving dynamically along a circular or an arc-shaped loose interface show that the wave field becomes indeed asymmetric with respect to the interface, and the induced waves can be strongly confined to specific regions on the convex side of the interface regardless of the Mach numbers. Possible influences of this asymmetric wave confining or focusing due to the existence of curved interfaces are considered by treating real phenomena found in the event of the 2024 Noto Peninsula, Japan, earthquake.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"77 ","pages":"Pages 183-189"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Angular Corners on Short Fiber Orientation and Mechanical Integrity in Extrusion 3D Printing 角对挤出3D打印短纤维取向和机械完整性的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.019

Jiongyi Yan , Minghua Cao , Yutai Su , Andrew Gleadall

{"title":"Effects of Angular Corners on Short Fiber Orientation and Mechanical Integrity in Extrusion 3D Printing","authors":"Jiongyi Yan , Minghua Cao , Yutai Su , Andrew Gleadall","doi":"10.1016/j.prostr.2026.01.019","DOIUrl":"10.1016/j.prostr.2026.01.019","url":null,"abstract":"<div><div>Angular paths and corners are common in toolpaths in material extrusion additive manufacturing and could affect shear and material flow. This study focuses on 3D printed corners by using short fibre reinforced materials regarding the fibre orientation and mechanics. 3D fibre orientation tensor at different turn angles (30°-150°) was measured, and main-axis alignment was low when it turned orthogonally, while out-of-plane alignment increased with the angles. The fibre orientation closely links to mechanical properties. Tensile tests showed decreasing response force with increasing turn angles, and failure was attributed to fibre pull-out, fibre displacement, and matrix plastic deformation. We built 2D finite-element models of the 150° corner with the composite Hashin damage criterion and energy-based damage evolution law, in order to simulate large deformation failure model. The mechanical simulation successfully captured important features of specimen fracture due to crack initiation and propagation, which agreed with the experiment. Finally, cyclic tensile of displacement-controlled modes showed fast mechanical degradation of the sharp corners (greater turn angles) and compliance of smaller turn angles. This study highlights the variation of fibre orientation and mechanical weakness at corners, especially for sharp corners. It may enlighten design strategies (e.g. lattices with angular corners) to control fibre orientation and avoid mechanical weakness.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"77 ","pages":"Pages 135-142"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Weibull Formulation for Capturing Fatigue Life Scatter in AM Alloys Supported by Fractographic Analysis 基于断口分析的增强Weibull公式捕捉AM合金疲劳寿命散射

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2025.12.286

Luca Esposito , Matteo Bruno , Moreno Nacca

引用次数: 0

Effect of shot peening and heat treatments on the fatigue crack propagation on AlSi10Mg alloy specimens produced by L-PBF 喷丸强化和热处理对L-PBF法制备AlSi10Mg合金试样疲劳裂纹扩展的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2025.12.285

R. Fernandes , J.S. Jesus , L.P. Borrego , J.A.M. Ferreira , R. Branco , J.D.M. Costa

{"title":"Effect of shot peening and heat treatments on the fatigue crack propagation on AlSi10Mg alloy specimens produced by L-PBF","authors":"R. Fernandes , J.S. Jesus , L.P. Borrego , J.A.M. Ferreira , R. Branco , J.D.M. Costa","doi":"10.1016/j.prostr.2025.12.285","DOIUrl":"10.1016/j.prostr.2025.12.285","url":null,"abstract":"<div><div>Laser Powder Bed Fusion (L-PBF) enables the 3D printing of components in Aluminium alloys, widely used high-performance engineering applications, whereby it is fundamental the understanding of in-service fatigue behaviour. Current paper is focused on the fatigue crack propagation of AlSi10Mg aluminium alloy using CT specimens. The tested material conditions included as-built (AB), as-built shot-peened (AB+SP), stress-relieved (SR) and stress-relieved shot-peened (SR+SP), loaded in mode I. The purpose of the work was to understand the correlation between post-built treatments, residual stresses, porosity defect levels and fatigue crack growth (FCG), including transient regime after overload applications. The porosity levels were obtained by tomography technique. The residual stress relief and their subsequent stabilization were the main mechanisms responsible for improving the fatigue crack growth resistance. The as-built shot-peened condition showed minimal influence on FCG rates in the near-threshold regime but did increase the threshold value. At higher ΔK values, the FCG behaviour of as-built and as-built shot-peened specimens was similar, and for stress-relieved specimens, shot-peening treatment provided no notable benefit, as FCG rates for stress-relieved and stress-relieved shot-peened conditions were comparable.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"76 ","pages":"Pages 43-49"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Homogenised Material Approach to Predict Fatigue Life of Additively Manufactured PLA with Different In-fill Levels 用均质材料方法预测不同填充水平增材制造PLA的疲劳寿命

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2025.12.292

Mehmet F. Yaren , Luca Susmel

引用次数: 0